sperry



(No Model.) 2 snees-she =,t 1. E. A. S'PERRY. ELECTRIC' MINING MACHINE.No. 405,188. Patented June 1l, 1889.y

NY PETERS. PhvLiihngrnphr. Washington, D. C.

(No Moden) 2 sheets-sheet 2.

E. A. SPERRY.

ELECTRIC MINING MACHINE.

No". 405,188. Patented June 11, 1889..

UNITED STATES PATENT OEEICE.

ELMER. A. SPERRY, OF CHICAGO, ILLINOIS, ASSIGNOR TO TI-IE SPERRYELECTRIC MINING MACHINE COMPANY, OF SAME PLACE.

ELECTRIC MINING-rMACHINE.

SPECIFICATION forming part of Letters Patent No. 405,188, dated June.11, 1889.

Application lerl April l, 1889. Serial No. 305,585. (No model.)

T0 @ZZ w/wnt t may concern:

Be it known t-hat I, ELMER A. SPERRY, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Electric lVIining-Machine, of which thefollowing is a specification.

My invention relates to automatic drillingmachines, particularly formining purposes, and has for its object to provide convenient means fordrilling, Vand particularly for electric drills or mining-machines forcoal-mining and the like. This object I accomplish by means of themechanism illustrated in thea-ccompanying drawings, wherein- Figure l isa plan view with certain parts removed. Fig. 2 is a vertical section.Fig. 3 is a rear view. Fig. 4. is a cross-section through the line X Xof Fig. l. Fig. 5 is a -cross-section on the line Y Y of Fig. l throughthe cross-head. Fig. G is a detail of the pitman. Fig. 7 is a detail ofthe clutch mechanism, and Fig. S is a detail of the switch.

Like parts are indicated by the sameletter in all of the figures.

A A are the Wheels journaled on the supporting-frame A, which frame isprovided with the rear handles A2 A2.

A3 is a hinged front cover, which may be used to protect the workingparts of the machine.

A1 are the field-magnets mounted on the standard A5, which rises fromthe frame of the machine.

A6 AG are the pole-pieces inclosing the armature A1, which is secured onthe shaft A3. This shaft is journaled at one end in the box A3,supported by the arms A10, and at the other in the foot-block A11 of themachineframe. On the shaft A3, which is screwthreaded at its lower end,is the nut A13, which, together with the end of such shaft, bears uponthe block A11. The armature is pro vided with the commutator A11, uponwhich bear the brushes A15 A13. These brushes are connected with theconductors B B, the conductor B leading through the rheostat B'2 andswitch B3, which has the arm B1 to normally cover the fusible conductorB5 in the conductor B. On the shaft A3 of the armature is the pinion C,meshing with the gear C,` whose shaft C" is journaled below 1n likemanner as the shaft A3, and above in the framebar C3. The shaft A3 andthe shaft of the gear C', which latter shaft also carries the pinionsC2, are similarly j ournaled, passing each4 through the back plate C3,which serves as a guide, as indicated in Fig. 2. The back plate C3 issecured to and forms part of the frame of the machine. One pinion C2meshes with the large gear C1, which is similar to a gear C1. Thislatter gear is driven by a pinion C2 and on the same shaft C3. The crankconsists of the two plates D D, secured together by the crank-pin D',the lower pivoted ou the trunnion D2, rising from the base-plate A12 ofthe frame, and the upper on the trunnion D3, projecting from thecylinder D4, which is secured in the cross-piece D5 of the frame, beingheld thereto bythe strap D6 and pin D1. Between the gear C1 and theinner annular flange of the pieces D D are the pockets D3 D3, wider atone end than at the other, and having in each a roller D3, normallyforced toward the smaller end of such pocket by the spring D10.

D11 are plates set into the body of the plates D to form a hardbearing-surface for such rollers.

D12 is a friction-collar encircling the crankpin D E is a strapencircling such collar on such crank-pinD and provided with a crossbar Ewhich passes through a slot E2 in the piece E3, and is provided withpins E1 E1, which project and center the spiral springs E1 E3. Thesesprings bear against the crossbar E of the strapE and the end of theslot E2. The strap E5 passes about the block composed of the twoportions E7 E1, which encircle the pin E3 on the end of thereciprocating head E3.

E13 is a key to hold the cross-bar E and E11 isa pin to secure the endsof the strap These several straps together constitute an elastic pitnianpivoted at one end yto the reciprocating head E3 and at the other to thecranlcpin D and composed, substantially, of two elastically connectedportions. The space between the curved portion of the strap or straps EE and the end of the piece E3 constitutes what I term the lost-motionslot IOO E12. The cross-head E9 is contained in the forward portion ofthe frame between the forward side pieces of the frame A and the forwardpart of the bottom portion A12, and travels upon these parts as abearing and is held down in position by the guiding-straps E13 E13. Tothis cross-head is secured the rcciprocating rod F, which passes throughan aperture in the forward part F of the frame. To this part F issecured a cylinder F2, containing the spiral spring F3, the inner end ofwhich rests against the frame part F. About the forward part of this rodF is a guidingcollar Fl and an end F5, through which passes the key F'Jlto secure the drill F7, which is shaped as shown-bifurcated at its endin side view and curved on one side, so as to bring the point in linewith the axis of the rod, as shown in Fig. 2. In this cross-head E" aretwo cavities G, having each an aperture G', with a valve Ggthereover,and adapted to receive the piston G3, secured on the forward part of theframe.

ll is a funnel-shaped guard containing the lamp lrzl, supported on thespring ll2 and pro vided at its outer extremity with a gauze protectorIl,

.l is an indicator with hand and dial, and J is an incandescingconductor, which indicates the condition of the current in the dark.

J2 is a balance-wheel which controls the motions of the armature.

The use and operation of my invention are as follows: The machine,constructed substantially as shown, is supported, preferably, at itscenter of gravity on the wheels, an d is presented to the work by theoperator, who seizes the handles in the rear. A current of electricityis provided by means of suitable conductors and is controlled as to litsquantity and application by means of the switch and rheostat. Itscharacter is determined by means of the indicators on the rear of themachine, the one being visible in the dark and the other capable of usein the light. A suitable current being provided and turned on bytheoperator, the armature rotates, and with it its shaft, thus rotating thepinion thereon. rlhis pinion drives the meshing gearon the shaft C, andhence the pinion C2 and its accompanying pinion C2, which pinionsintermesh with the large gears C" and CT, thus driving them in thedirection of the arrow in Fig. 7. As these gears are driven forward therollers D" are forced into the contracted portions of their respectiveslots, and the crank-platcs l) and their connected part-s are locked toand carried with the gears CL and CT in their forward rotation, t-husrctracting the elastic pitman, and with it the cross-head E and rod F,and contracting the workin g-spriu g F. As soon as the cranlepin D haspassed the center theaccuinulated energy of the spring will tend to movethe rod F forward with greater rapidity than it would have if rigidlysecured to the gear (.14, and hence the crankplates tend to rotate inthe same direction as the arrow, but with greater rapidity than thegears Cl and C7. This tendency loosens the rollers D, and hence freesthe crank-plates from the gears, and the rod F is free to be forcedforward by the spring F, and with it is carried the drill FT. Thisdrill, shaped as shown, delivers a most effective blow directly from theaxis of the rod F. The slot En permits the crank-pin D to make itscircuit until the two gears CA1 and CT are again locked to suchcrank-plates without the said crankpin giving any positive motion tothepitman. and rod F. In short, the pitman and rod F are forced upwardby the spring alone through the remainder of the stroke, or until theparts are again connected, so as to recompress the spring. lf the strokebe delivered through a short distance, the inertia of the machine issuch that before the unexpended energy of the spring can be put forth topush back the machine-which it would do-the rapidly-ro tatingcrank-plates, moving under the influence of the spring, owing to theirmomen tum, will have brought the crank-pin to such a position as that itwill engage the strap E at its bend and thus instantly begin the operation of recompressing the spring again.

To avoid the evils of the considerable blow of the crank-pin against thestrap at this point, the elastic pitman, or pitinan composed, as shown,of the two portions-one conn-ected with the crank-pin, the other withthe crosshead pin, and the two connected through the medium of thesprings E, against which they respectivelypullin oppositedirections-isprovided. The air-cushion inthe cross-head prevents injuryto the operative parts when the blowis not delivered elsewhere. Theelectric light in. the forward end ot' the machine, supported on aspring, so as not to be easily shattered, delivers a light at theworking-point.

The arrangement of the fusible conductor B5 beneath the arm B" of theswitch is such as to make it impossible for such fuse to be removed orreplaced while the circuit is closed. The electric light in the front ofthe machine I terma search-light, and the same maybe attached to theworking-circuit, as indicated diagrammatically in Fig.

I have spoken of the driving mechanism for the drill, and this term mustbe understood to mean the mechanism which compresses the sprin whichultimately drives the drill. The interior of the funnel-shapedlamp-protector serves as a reflector. v

lt will be readily understood. that the ma chine may be operated eitherin series or i1iultiplesarc-circuit relation. In the latter case aconstant potential is used, and should the motor be stopped from thebinding of its parts, or otherwise, its counter electric-motor forcewould be wholly or partially nullified, with the effect that a powerfulcurrent would tend to flow through the motor, tending to destroy itsinsulation by burning. I have devised a currentindicator by means ofwhich this abnormal flow may he detected and the lOO TIO

TIS

motor disconnected from circuit before any injury is sustained thereby.The object of having the outer end of the inclosing-cylinder open is tofacilitate the removal of the guidecollar, spring', and other wearingparts. This collar is independent and removable, and when worn out canbe replaced.

The electric or spring-energizing motor, designed to energize the springor other drivingmotor, should catch the drill and begin its Work ofenergy-storing for the next stroke at substantially the end of theeifective stroke of the drill, leaving no time for pushing back theminer, and hence I have devised the clutch mechanism to re-engage thedrivingmotoras soon as the drill has delivered its blow.

I refer to my application of even date herewith, Serial No. 305,585, andmy application tiled prior thereto, and I here expressly disclaim the 1natters claimed in said applications.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows:

l. In a mining-machine, the combination of a suitable supporting-framewith a drill, a drivingmotor for said drill, an electric motor toenergize said driving-motor, and an intermittently and irregularlyoperating catch consisting in part of a pitman attached to and movingwith the drill or drill-rod, said catch adapted to intermittentlyconnect the two motors, so that their re-engagement is dependent uponthe length or duration of the effective stroke of the drill.

2. In a mining-machine, the combination of a suitable supporting-framewith a drill, a driving-motor for said drill, an electric motor toenergize said driving-motor, and an intermittently and irregularlyoperating catch consisting in part of a slotted pitman attached to andmoving with the drill or drill-rod, said catch adapted t6 intermittentlyconnect the two motors, so that their 1re-engagement is dependent uponthe length or duration of the effective stroke of the drill.

3. In a mining-machine, the combination of a suitable supporting-framewith a drill, a driving-spring for said drill, an electric motor toenergize said spring', and an intermittently and irregularly operatingcatch consistin g in part of a slotted pitman attached to and movingwith the drill or drill-rod, said catch adapted to intermittentlyconnect the spring and motors, so that their re-engagement is dependentupon the length or duration of the leffective stroke of the drill.

4. In a mining-machine, the combination of a suitable supporting-framewith a drill, a driving-motor for said drill, a motor to energize saiddriving-motor, and an intermittently and irregularly operating catchconsisting in part of a pitman attached to and moving with the drill ordrill-rod, said catch adapted to intermittently connect the two motors,so that their re-engagement is dependent upon the length or duration ofthe effective stroke of the drill.

5. In a drilling-machine, the combination of a drill with a rod to whichit Vis secured, a spring encircling said rod, and a free collar on theend of such rod bearing' against the end of the drill proper, saidspring bearing at its end, respectively, against such collar and thefixed portion of ,the machine.

6. In a drilling-machine, the combinat-ion of adrill, a rod to whichitis securcd,a spring encircling such rod, a free collar on the end ofsuch rod bearing against the end of the drill proper, said springbearing at its end, respectively, against such collar and a fixedportion of the machine, and a spring inclosing and protecting cylinder.

7. In a drilling-machine, the combination of the drill with a rod towhich it is secured, a spring encircling such rod, a cylinderinclosingsuch spring and rod, and a guidingcollar about such rod within suchcylinder and bearing on one side against the end of the drill proper andon the other against the end of the sprin S. In a drilling-machine, thecombination of a drill with a reciprocating pitman therefor, twodriving' gear-wheels on opposite sides of said pitman, a clutch toconnect said pitman and gear-wheels, an actuating-motor for saidgear-wheels, and aframe to support such parts in operative position.

9. In a drilling-machine, the combination of a drill with areciprocating pitman therefor, two driving gear-wheels on opposite sidesof said pitman, a clutch to connect said pitman and gear-wheels, anactuating electric motor for said gear-wheels, and a frame to supportsuch parts in operative position.

l0. In a drilling-machine, the combination of a drill with areciprocating pitman therefor, two crank-plates connected with saidpitman and on opposite sides thereof, a clutch whereby the pitman andplates are connected, an actuating-motor to drive such plates, and aframe to support such parts in operative position.

1l. In a drilling-machine, the combination of a drill with a pitman,crank-plates on opposite sides thereof, a clutch to connect the pitmanand plates, an actuating electric motor to drive such plates, and aframe to sup port such parts in operative position.

l2. In a drilling-machine, the combination of a drill with a pitman, acrank plate and pin, a driving-wheel, a motor to actuate the same, and aclutch between such crank-plate and driving-wheel on each sidev of thepin.

13. In a drilling-machine, the combination of a drill with a pitman, acrank plate and pin, a driving-wheel, a motor to actuate the same, and arelease between such crank-plate and driving-wheel on each side of.thepin.

14. In a drilling-machine, the combination of the drill-actuatin gmechanism with a frame on which the saine is supported, a spring IOC)IIC

which eneireles and drives the drill, an outwardly open-endedinelosing-eylinder therefor secured to such frame, and at removabledrill-guide within sueh cylinder.

'15. In t drilling-machine, the Combination of ay drill with itdriving-spring, apitnmn eenneeted with sueh drill it one end andprovided with t long` slot et the other end, a erztnk whose pin engagessueh slot, it drivingslntft to which sueh crank is attached, and meansfor driving the same so that the pit-y nutn may move independent of thecrank during' a portion of its stroke.

1G. In 2t drilling-machine, the eombinzttien of u drill with a springladapted to force the drill forward, t pitman connected with sueh drillatene end and provided with@ long slot :Lt the other7 L crank whose pinengages suoli slot, :t driving-shaft to which sueh Crank is attached,means for driving' the same, and t eluteh connectingI said erztnk tosaid shaft so :1s l to lock them together when one moves faster than theother and release them when their relative speed tendency changes.

17. In a, drilling-machine, the combination of :t suitablesupporting-frame with :t drill, means for driving the sinne, includingthe shaft, a crunk on said shaft connected to other parts of the drivingmeclianism, and a eluteh which looks the shaft and the eraflik togetherwhen one moves fester than the other and releases them when theirrelative speed tendencies Change.

1S. In e drilling-machine, the combination of a drill with Ln eleetriemotor for driving' the seme, an electric-current indicator eonsisting oftwo elements7 one adapted to he read in the light and the other in thedark, and a suitable suppoi'ting'l'rznne on which the parts are seenred.

Signed this 30th day of March, 1889.

FRANCIS W. PARKER, CELESTE P. CrmirMAN.

